Use a direct include of strings headers in chrome/browser/r*-s*/.

chrome/browser/renderer_host/offline_resource_throttle.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/renderer_host/offline_resource_throttle.h"
 
 #include <vector>
 
 #include "base/bind.h"
 #include "base/logging.h"
 #include "base/memory/singleton.h"
 #include "base/metrics/histogram.h"
-#include "base/string_util.h"
+#include "base/strings/string_util.h"
 #include "chrome/browser/chromeos/offline/offline_load_page.h"
 #include "chrome/browser/net/chrome_url_request_context.h"
 #include "chrome/common/url_constants.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/render_view_host.h"
 #include "content/public/browser/resource_controller.h"
 #include "content/public/browser/web_contents.h"
 #include "net/base/net_errors.h"
 #include "net/base/net_util.h"
 #include "net/base/network_change_notifier.h"
@@ skipping 117 matching lines @@
         base::Bind(
             &ShowOfflinePage,
             render_process_id_,
             render_view_id_,
             request_->url(),
             base::Bind(
                 &OfflineResourceThrottle::OnBlockingPageComplete,
                 AsWeakPtr())));
   }
 }